7937400642 has 48 divisors (see below), whose sum is σ = 16673057856. Its totient is φ = 2518365600.

The previous prime is 7937400637. The next prime is 7937400643. The reversal of 7937400642 is 2460047397.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7937400594 and 7937400603.

It is not an unprimeable number, because it can be changed into a prime (7937400643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 340443 + ... + 363009.

It is an arithmetic number, because the mean of its divisors is an integer number (347355372).

Almost surely, 2^7937400642 is an apocalyptic number.

7937400642 is an abundant number, since it is smaller than the sum of its proper divisors (8735657214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7937400642 is a wasteful number, since it uses less digits than its factorization.

7937400642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22695 (or 22664 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 7937400642 is about 89092.0907937399. The cubic root of 7937400642 is about 1994.7697208465.

The spelling of 7937400642 in words is "seven billion, nine hundred thirty-seven million, four hundred thousand, six hundred forty-two".